<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
  <style>
    /* 鼠标悬停样式改变 */
    button:hover{
        color: red;
        /* 
        鼠标图标 */
        cursor: pointer;
    }
    /* 
    被点击激活
     */
     button:active{
        color: aquamarine;
     }
  </style>
</head>
<body>
    <button>下雨了
    </button>
 
</body>
</html>